John Emerson (born Clifton Paden on May 29, 1874 – March 7, 1956) was an American stage actor, playwright, producer, and director of silent films (many featuring Douglas Fairbanks). Emerson was married to Anita Loos from June 15, 1919 until his death; prior to that they had functioned as a writing team for motion pictures and would continue to be credited jointly, even as Loos pursued independent projects.

John Emerson became one Triangle's best-known directors, primarily after the partnership with writer Anita Loos began in 1916; Griffith also valued the pair as being among the best film editors in the business, and they also worked on editing Griffith's massive Intolerance in addition to light, breezy and athletic comedies starring Douglas Fairbanks. Emerson seemed to lose interest in direction around 1919, and afterward worked as a producer and writer, though commonly in projects more readily associated with Loos' taste than his own. Loos wrote extensively, and often disparagingly, of Emerson in her memoirs, but in her early career insisted on maintaining the appearance of partnership with Emerson even if there was none.[1] Emerson's later years were marked by mental illness and long institutionalizations; Loos never divorced him.

Although Anita Loos' memoirs may not paint Emerson in the most flattering of terms, the silent films he directed from 1915–19 were important ones. Most of them survive, and several—notably The Mystery of the Leaping Fish and The Americano—remain among the most frequently seen films from this period.